Electric-light switch.



W. W. FULTON. LLEGTRIG LIGHT SWITGIL APPLICATION FILED SEPT. 23, 1907.

Patente Deo. 29, 1908.

the same taken on the line 9*-9 of Fig. 8.

WALTER W. FULTON, OF CHICAGO, ILLINOIS.

EiECTRC-LXGET WlTCH.

No. oor/,770.

Sp eccetion ci Lettere Eatent.

Fatentedbec. 29, 1903.

Application tiled September 23, 1907. Serial No. 394,188.

To all whom it may concern:

Be it known that I, WALTER W. FULTON, a l citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Electric-Light Switches, oi which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to switches for controlling the current supply of electric lamps, or other appliances supplied with' electric current ina` similar manner.

More specifically, the invention relates to such electrical switches as are operated by a pull upon a pendent cord or chain.

The invention contemplates means for adapting electrical switches provided with a rotatable operating member, such, for example, as the switches ofthe incandescent electric lamp sockets now in common use, wherein the operating member of the switch comrises a turn button which projects laterally from the casing of the socket and is of flattened form designed to be grasped for rotation between the thumb and index 'linger of the hand, for actuation by a cord or chain designed to be pulled downwardly.

The object of the invention is to provide a paratus by means'ot which the actuation or.electrical switches may be conveniently effected.

In the accompanying drawings-Figure 1 shows in side elevation an incandescent electric lam and switch socket therefor, together vwith apparatus provided by the invention for turning the switch; Figs. 2 and 3 are a side and end elevation, respectivel of a detail of the apparatus separated rom other parts, a sli ht modiiication of the construction being s own in Fig. 2; Fig. s. is a detail side elevation of the tuin button or thumb-'piece oivthe switch socket illustrated in Fig. .1, showing the method of applying the apparatus provided by the invention thereto F1g.'5 is a plan view of the sheet metal blank from whic a part of the apparatus, as illus,- trated in Figs. 1, 3 and 4, may be formed; Fig. 6 is a detail side elevation or' the thumbpiece of an incandescent lamp socket showing a modified form of apparatus provided by the invention ap lied thereto; Flg. 7 is a sectional view of tie same taken on the line the same; and Fig. 9 is a sectional view ci change inthe switch from that last'pro illustrated in Fig. 5.

The switch socket for an incandescent elec tric lamp 10, is shown in the drawings' at 1i, the usual rotatable thumb-piece or key for turning the switch being designated 12. rI/he head of this key is oi' the flattened T form, most clearly shown in Fig. ii and now almost universally provided upon lamp sockets of the type illustrated.

In carrying out the invention in the man.- ner illustrated in Figs. 1 to 5 inclusive ofthe drawings, a cross-arm 13 is applied to the ke 12, and a pendent cord or chain, as 14, 15, is provided at each end of the cross-arm where I a rotation of the key for changing the switc4 of the socket may be effected by pullin downwardly upon one ol the chains, a pu upon each chain eli'ecting a rotation o the key in the opposite direction from that effected by a pull upon the other. K

Freferabl the chains 14 and 15 are of equal lengt. and the cross-arm 13 is so ap'- p'lled to the key 12 that it passes the horizon-,-

tal position in moving in either direction through the distance necessary to change the switch. By this" means the chain should'be pulled for effecting the op osite duced will always occupy the higher position, and can be easily distinguished from the other at a glance or by feeling with the handin the dark.

For attaching the cross-arm 13 to the head of the key 12, it will preferably be provided with arms 16, 17, adapted to straddle the key each of the arms being apertured, as indicated at 18, to receive one of the ends oi' the T` head of the key. Most conveniently the device will be formed of splring metal and the arms 16, 17, turned to t e position, with relation to the part 13 illustrated in Figs. 2 and 3, whereby, when the device is applied to azkey 12, as illustrated in Figs'l and 4, the ciontraction of the metal will serve to retain .the arms 16, 17, in position and draw the art13 firmly to its seat upon the head of t o key.

As shown in Figs. 1, 3 and 4, the part 13 and arms 16, 17, are formed integral, the device being made from a blank oi'sheet metal, In Fig. 2 the arms 16, 17, are shown as being made from a single piece in the form of a clip, separately from the part 13 to which the clip is permanently united by a rivet 19.

If desired the device may be so constructed that the switch key of an electric lamp socket is always turned by it in the saine direction.

asl

Such an embodiment of the invention is illustrated in bigs. 6 to 9, inclusive, of the drawings. In this instance but one chain or cord,

upon the cord thereby effecting the'oppositechange in the switch troni that last produced. A spring clip 23, comprising tvvoarms as'24, 25, adapted tostraddlethe' head of a switch key l2, is provided, each of the arms 24, 25, being epertured to receive one side of the key heed. To this clip e ratchet plate 26 is rigidly secured byte shouldered rivet 27, While the chain erin.A 2]. is preferably swingingly mounted u on the same rivet and carries a pawl 2,8, vf'nich coperaties with the ratchet plate 26 for turning the key 12 when the erin 21 is swung bye downward pull upon the chain or cord 20. Preferably the erm 2 is extended beyond its pivotal 'engagement With the rivet 27 and is the-re provided with a couiiterweight 29 for returning the chaincarrying end of the erin to en elevated posiwn that part of the erm 21 adjacent inside of greater width than the te 26, es indicated et 3G, end is with e margine! iange 3i designed. "e e prctective covering for the key 12, and be applied thereto convenient for use in the manner described, Without tpells or the exercise ci more than ordinary s n i .f

i claim es my invention- 1. In combii'ietion, si spring clip having arms adapted to embrace the cttened T head of en electrical switch key from end to end, each erm of the clip being apertured to receive one end of the key headn crank firm carried by the clip, end e pendent cord cerii'ed 'by the crank arm. y

'A ln combination c spring clip havin ttrrn's adapted to embrace the'iattened'' hea of im' electrical switch key fromlend to end, each arm of the cli being apertured to ref ceive one end of the ey heed, e ratchet plete carried by the clip, en erm pivotelly secured tc and carried by the clip to swing over the plete, e pawl carried by the erm for engaging the plete, e pendent cord secured to the free end of, the arm, and means for raising the arm.

3. In combination, e spring clip having arms cdapted to embrace the i'ette'ned head of an electrical switch-key from end to end, each erm of the clip being apertured te receive one end ofthe key head, and rotating Ineens carried by the clip.

WALTER W. rumen. i 

